login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A117326 Indices of semiprimes in A117322 prime(n) modulo semiprime(n). 0
13, 17, 18, 20, 21, 27, 28, 30, 32, 41, 42, 43, 46, 47, 49, 53, 55, 56, 58, 59, 63, 69, 72, 75, 81 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..25.

EXAMPLE

a(1) = 13 because A117322(13) = prime(13) modulo semiprime(13) = 41 mod 35 = 6 = 2 * 3 is semiprime.

a(2) = 17 because A117322(17) = 59 mod 49 = 10 = 2 * 5 is semiprime.

a(3) = 18 because A117322(18) = 61 mod 51 = 10 = 2 * 5 is semiprime.

a(4) = 20 because A117322(20) = 71 mod 57 = 14 = 2 * 7 is semiprime.

CROSSREFS

Sequence in context: A084307 A066918 A164062 * A052055 A272119 A075761

Adjacent sequences:  A117323 A117324 A117325 * A117327 A117328 A117329

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post, Mar 08 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 20 05:34 EDT 2019. Contains 321344 sequences. (Running on oeis4.)